Double-disk furrow-opener.



Nmawss. l PATBNTED AUG. 25, 1903.

H. C. HAM.

DOUBLE DISK PURROW OPENER. APPLmA'rIoN FILED Dnc. 29. 1902.

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No. 736,963. i

UNITED STATES Patented August 25, 1903.

PATENT OEEICE.

HENRY C. HAM, OF LIBERTY, INDIANA, ASSIGNOR TO RUDE BROTHERS MANUFACTURING COMPANY, OF LIBERTY, INDIANA.

DOUBLE-DISK FU RROW-OPENER.

SPECIFICATION formingpart of Letters Patent No. 736,963, dated August 25, 1903. Application filed December 29, 1902. Serial No. 137,007. (No model.)

To @ZZ whom it may concern.-

Be it known that I, HENRY C. HAM, a citizen of the United States, and a resident of Liberty, in the county of Union and State of Indiana, have invented a certain new and useful Improvement in Double-Disk Furrow- Openers, of which the following is a full, clear, and exact description, reference beinghad to the accompanying drawings, which form part of this specification.

My invention relates to furrow-openers of the kind in which two disks are employed.

The object of' my invention is to obtain a construction of this kind which shall have all the advantages of a single-disk furrowopener and also the advantages of a doubledisk furrow-opener, and yet shall be free from the disadvantages of both.

In carrying out my invention I use two concave disks, one of smaller diameter than the other, and mount them in such manner that their concave sides are turned in the same direction, with their centers in the same horizontal plane, the smaller disk touching the larger disk near its rim at its lower forward edge, so that the two disks will rotate together 'and in unison. The larger disk is set at an angle to the line of draft in the usual manner, so as to open the furrow. The smaller disk takes no part in the opening of the furrow, but acts as a landside, so as to compel the larger disk to maintain its alinement. At the same time it keeps open the furrow and keeps the furrow clear of all trash, clods, dto.

With my improved furrow-opener I so ai range the grain-tube that it will discharge the grain just back of the hub of the disks. In doing this the grain is discharged against the inner concave side of the smaller disk and by it is defiected so as to fall into the center of the furrow. Should the grain first strike the convex side of the larger disk, it will simply be deflected over to the concave side of the smaller disk'and from there thrown into the center of the furrow, as before. At the same time while the smaller disk is rising at the rear as it rotates and the grain is descending this motion of the disk has a tendency to scatter the grain in the seed-bed, which is a material advantagein sowing grain.

Other advantages of my improved furrowopener will appear as I proceed with my speci fication and in the combinations specifically pointed out in the claims.

In the drawings, Figure lis a top line view of my improved furrow-opener, showing a portion of the drag-bars. Fig. 2 is a side elevation of the same looked at from the land side. Fig. 3 is a side elevation looked at from the opposite side, and Fig. 4t is a horizontal cross-section of the bearing.

A and B kare the disks- A the smallerdisk and B the larger disk. They are preferably mounted on two drag-bars C C', suitably braced apart by the spacing-blocks c c.

Gr and H are the journals, respectively, of the two disks B and A, which are provided with the hubs G and H'. Said hubs G and H are secured to their respective disks in any convenient manner. A casting D, supported from the drag-bars C C', as will be presently described, serves as a seat or support for the journals Gand H. Said journals are clamped together and to the casting D by means of a bent bolt J, suitable washers a b c being used to prevent binding of the 'parts of the bearing. Straps E and F serve to support the casting D from the drag-bar C', and, if necessary, an additional bracing-strap, running from the drag-bar C to the other end of the bolt J, may be emlpoyed, as shown in dotted lines in Fig. 2. The parts are so constructed and the journals madeat such an anglethat the smaller disk touches the larger disk at its lower forward edge on the dotted line m m. (Indicated in Fig. o.)

A graintube H is secured by suitable ears to the rear ends of the drag-bars O Oin such manner that it passes down back of but near the hub or journal of the disks. This position of the grain-tube causes the grain to be discharged immediately beneath the center of the disks and directly in the furrow. It

is evident that by this construction the disks revolve together, so that there is no friction between them on account of one rotating against the other and no dragging through the ground, forthe reason that both disks roll together right through the furrow. This causes a very light draft and of course is a material advantage in the construction of furrow-openers.

I do not wish to limit myself to the exact construction and arrangement of parts set forth in the drawings; but

What I desire to claim as new, and to cover by Letters Patent, is

1. Adouble-disk furrow-opener comprising two concave disks, the one slightly smaller than the other, arranged with their concave sides in the same direction, both adapted to rotate together, with the lower forward edge of the smaller' disk touching the convex side of the larger disk near its lower forward edge, substantially as described.

2. A double-disk fu rrow-opener comprising two concave disks, the one slightly smaller than the other, the two disks mounted on axes at an angle to each other but lying in the same horizontal plane, with the concave side of each in the same direction, and the lower forward edge of the smaller disk touching the larger disk near its periphery, the two HENRY C. HAM;

Witnesses:

H. DARR, R. T. SoMMERs. 

